Bumanglag, Angel Iyanla P.  <br/><br/>
Utilization of chicken eggshells as an alternative material for sintra board/ 
Angel Iyanla P. Bumanglag, Sandra Mae G. De Serra, Vanessa Unice T. Gonzales, Kyle Angelo B. Languayan, and Jenina Franchezka F. Lardizabal.-- 
 - Manila:  Technological University of the Philippines,  2025. 
 - xi, 91pages:  29cm. 
<br/><br/> Bachelor's thesis 
<br/><br/>College of Industrial Technology.-- 
<br/><br/>Includes bibliographic references and index. 
<br/><br/> The project study, “Utilization of Chicken eggshell as an Alternative Material for Sintra<br/>board”, aims to produce chicken eggshell based boards that can become a substitute to<br/>the typical Sintra board. The use of chicken eggshells as an innovative & eco-friendly<br/>alternative to PVC can help reduce excessive plastic usage in the printing industry.<br/>Chicken eggshells can be widely found in the Philippines; in this regard, the eggshells<br/>used in this study were collected within Metro Manila and Cavite. The eggshells were<br/>gathered and processed in stages, including washing, sun drying, crushing, grinding,<br/>sifting, powderizing, mixing, molding, curing, and sanding. Epoxy resin and cornstarch<br/>were used as the primary binding agents and microsphere as additive to make the board<br/>lightweight. Three different formulations of the eggshell-based Sintra board were<br/>produced, each measuring 8.3" x 11.7" (A4 size) with a thickness of 3 millimeters. The<br/>formulations underwent ASTM standard tests to evaluate the quality of the material.<br/>Formulation A (FA), composed of Eggshell (35%), Epoxy Resin (50%), Cornstarch (5%),<br/>and Microsphere (10%), received the highest ratings in terms of tensile strength, flexural<br/>strength, peel adhesion, chemical resistance, and performance in the thermal expansion<br/>test. The same formulation demonstrated quality performance in sticker application and<br/>UV printing, and was presented to the survey respondents as a finished product for<br/>evaluation. The project was evaluated by 35 respondents composed of PMT students and<br/>PMT professors of the Technological University of the Philippines and printing<br/>professionals that are within Metro Manila. The project study was rated with an overall<br/>mean of 4.65 with a descriptive rating of “Highly Acceptable.” This study succeeded to<br/>produce a standard and performance-tested chicken eggshell based Sintra board as an<br/>eco-friendly alternative to common Sintra board, contributing to the ongoing search for<br/>environmentally friendly materials in the printing industry. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Eggshell-based<br/>Printing substrate<br/>Sintra board
<br/><br/><label>LC Class. No.: </label>BTH TP 949   / B86 2025